The applicable information from all the entries present in ZoneDef.txt are imported into this index on server start. Any new non-grove zones (such as new dungeons) don't necessarily have to manually updated here.
Each line contains 4 values separated by the delimiter. They appear in this order:
|Zone ID||Integer. Used as the table key. The Zone ID must be unique.|
|Account ID||Integer. For groves, this is the Account ID of the owner. This property is used for enumerating groves via the /grove command.|
|Warp Name||String. The full warp name of this zone, as when using the /warpi command. Case sensitive.|
|Grove Name||String. For groves only. This should match the player account's grove name (see AccountList.txt)|